Fully functioning & in good condition with some mild play wear.
The Keeley 4 Knob Guitar Compressor is a true audiophile and studio-grade compressor, with exotic rackmount-quality in a stomp box. The Keeley compressor pedal ships with the 9V DC jack at the top end of the guitar pedal and use the same type of power supply used by nearly all guitar effect manufacturers.
Internal Attack Control
The compressor pedal has an Internal Attack control, designed for bass players with high-output active pickups or active pedal boards with buffers.
The Keeley compressor pedal also has an Input Sensitivity Control, meaning you can use this in your studio to run keyboards, drum machines, drum mics, even master recordings and other line-level uses. You'll raise your signal to a new level of sonic awesomeness.
True bypass switching circuit
True bypass means that when the effect is off your guitar tone will not be affected at all. The true bypass circuit makes sure you have absolutely no tone loss or signal reduction through the compressor pedal in the off/bypass mode.
Triple-pole double-throw switch
This switch makes sure you have absolutely no tone loss or signal reduction through the Keeley 4-knob compressor even in the off mode. Other compressors use a cheap switch and design that runs down your signal even when off or if the battery goes weak.
The Sustain Control
The 9 O'clock position should be barely noticeable. It will just take out really loud sudden peaks, this is great for protecting your speakers and the like. The 12 O'clock position provides the right presence for using the Keeley compressor pedal continuously while performing. The 3 O'clock position is great for solos. It really adds some cool effects to your playing dynamics. Only when really cranked do you get the pluck sound of your pick emphasized.